Lens-grinding machine.



No. 839,345. PATENTED DEC. 25, 1906. A.-WA-GNER.

LENS GRINDING MACHINE.

APPLICATION FILED FEB.2,1906.

INVEN TOR. 12101?- Wagfifr ATTORNEY.

" render such a lens-grinding machine automatic in its operation and toprovide it with skilled operator.

' 5 is the driving-shaft 6, by which motion is the other end isconnected to an upr' ht post or column 12 by means of a joint s own in'trated in the Unite .ANTON WAGNER, OF PHILADELPHIA, PENNSYLVANIA...

' LENS-GRINDING MACHINE.

Specification of Letters Patent. Application filed February 2, 190a.Serial No. 299.170.

Patented Dec. 25, 1906.

To all whom it may concern:

Be it known that I, ANTON WAGNER, a citizen of the United States,residing in the city and county of Philadelphia, State of Pennsylvania,have invented a new and use' ful Im rovement in Lens-Grinding Machines,of which the following; is a full, clear, and com lete disclosure.

invention relates to'those lens-grinding mac es in which a rotary motionand also a reciprocatin motion in one direction are given to one 0 a airof grinding members, such a machine e' disclosed and illus- StatesPatent No. 646,672, granted to me April 3., 1900.

The objectofthe present invention is'to means for causing one of thegrindin mem-. bers to perform as closely as possi Ie the motions usuallygiven to it at the hands ofa Briefly, my invention consists in providinga machine such as is shown in the said patent with a simple andefficient means for reciprocating-the upper member.

. For a full, clear, and exact descri tion of m invention reference maybe ha to the f0 lowing specification and to the accompanying drawings,forming a part' thereof, in which similar figures of reference indicatecorresponding parts in the various views.

Figure 1 shows in perspective my improved lens-grind machine. Fig. 2 isa vertical central sectionof the same. Fig. 3 is a section on line 3 3of Fig. 2, showing a detail of my invention. l

1 indicates a baselate upon which is mounted a casing 2, inc osing t elens-grinding machine, of which 3 indicates the upper grinding memberand 4 the lower grindmg member. Mounted on the base 1 in bearingscommunicated to the finding-surfaces and upon which is mounted the tlghtand loose pulleys 7 and 8, controlled by the beltshipper 9..v

10 indicates'a pressure-lever by which the reciprocating motion iscommunicated to the" up er. grinding member. Said lever is 1'0- (led atone end with the handle 11 an at detail. in Fig. 3. Said joint consistsof a rectangular plate 13, the two opposite sides of which are providedwith or cars 14, ex-- tending at rightangles to the plate ,13. To theremaining two sides 'of the plate 13 are secured lugs 15 15, which alsoextend at right angles to the plate 13, but. in a direction opposite tothat of the lugs 14. The bolt 16,

passing through the ears or lugs 14, secures one end of the handle tothe plate and a similar'bolt 17, passing through the ears 15 secures theplate 13 to a bracket 18, provided with ears 19. By this means-thepressureumn 12 by a joint connection which permits the lever to beoscillated in anydirection. This bracket 18 is adjustably clamped 22, inwhich. is adjustably secured a bolt 23,

lever is virtually secured to the post or colprovided with nuts 24 andwashers 25, en-

gaging either side of the presssure-lever' 10. The lower end of the bolt23 is reduced in diameter and engages the upper member.

By the above construction it will readily be seen that the lever 10 canbe used to apply pressure to the upper member and also to reciprocatesaid-member with respect to the lower grinding member.

ressure-lever 10 is further rovided with a 00k 29, the shank of whicrests within a slot 30 in the top of an upWardly-projecti lug 31,attached to a link 32. To one end i the link 32 an adjustable pitman 35is attached, which in turn has its outer end in engagement with acrank-pin 36, mounted adjustably on thecrank 37 on then per end of ashaft 38, which, passing throug a bea 39 on the base 1, carries a pulley40, rotziiaild from the main driving-shaft b means of the belt 41 andpulley42. Attac ed to the base or table 1 is a helical spring 33, to thefree end of which the hook 29 is connected by means of a chain 34. 'Alsosecured to thebase 1 is a second helical spring 43, its free end beingconnected to the other side of the link 32 by a chain 44.

From the above description of the con-f The end of the pulley 40'. Bymeans of the crank 37 and connecting rod or link 35 the linkt32 -.will.be drawn in one direction, carrying with it the pressure-leverlO.When'the shoe has been drawn to the full throw of the crank,'it will bedrawn back by. the spring 43. In this manner a reciprocating motion iscommunicated to the lever and through it to the upper grinding-surface.The spring 43 operatmg in oppositionto the pull ofthe-connecting-rodpermits the rod 35 to be made of lightconstructionand-entirely avoids theeffects of 1 backlash in thecrankand-pitman connection. By adjusting or changing the.

length-of the-chain 34 agreaterorless amount of pressure-cambeapplied tothe pressure-lever LO-andthnough the pin .or bolt 23 totheupperg'linding member, while by moving the crank-pin toward or away'iromthe center .of

the shaft-38 a greater orless amount of recip-' rocation canbbe 'ven'to' the said grindingsurface. Upon t e casing 2 is mounted a bracket,26, adjustable -vertically upon the casing ,bymeans of:- the slot .{27and thumbscrew 28. This provides-a shelf or table tor the-reception ofthe link 32-when the oscillation and the pressuresapplying devices :aredisoonnected'from' the endoh the pressurelever 10.

0 :By means of the above-described invention-,g'rindingmachines whichare now operated only by sldiled; mechanics can be rendered'automatic intheir movement, and, secondly, thecost-of the productionof-compound 3 5lenses can be greatly reduced.

As the power tor-communicating motion to the l'eciprocating-arm= 10 isderived from the shaft which -rotates the 4 surfaces, bothmotions willbe startedand stopped @at 0 the .same instant, thus insuring uniformityand. perfection in the product. Furthermore,'- by "reason of thepeculiar above-described constructions the mechanism forreciprooating'the lever-10 canbe completely disconnected, and, ifnecessary; the finishing touches of the. grinding can be performed, asheretofore, by-the hands of a skilled mechanic. 'In this way one skilledworkman is enabled to attend to a number ofmachines,

and a high-grade hand-finishedlens is prop1 pressure to said lever.

. 3. :In a

duce'd. I

-What I claim-as myinvention, and desire toprotect by Letters-Patent ofthe United States, is a '1. In a lens --grinding machine, a lever, meansto oscillate the same, and yielding means-acting transversely tor theplane of the oscillation for applying pressure to said lever.

12. In a lens-grinding machine, a lever universally pivoted at one end,means to oscillate the same a yielding means acting transversely to theplane of the, oscillation for aplens-grin machine, a lever,- a un versaljoint by whic one end of-said lever means is supported, means foradjustin said joint vertically, means to oscillate sai lever, andyielding means acting transversely to the plane of the oscillation ofsaid lever for applymg pressure thereto.

4. In a lens-grinding machine, a lever fulcrumed at one end, means tooscillate said lever in one direction, yielding means to oscillate thesaid lever in the opposite direction, and yielding means actingtransversely tothe plane of the oscillation for applying pressure tosaid lever.

5. In a lens-grinding machine, the combi nation of a pressure-lever, andmeans'for oscillating the same, consisting of a crank and pitman -fordrawing the said lever in one direction, and an adjustable yieldingmeans for drawing said lever in the opposite direction. =6. In alens-grinding machine, the combination of a pressure-lever, a crank andpitman, a sprin working in opposition to said crank and a justableconnection secured to said spring, a link attached to said pitman andsaid connector, means for connecting said link with the free end of saidpressurelever.

7. In a lens-grinding machine, the combination of apressure-lever, alink, means for oscillating said link,-a pressure-applyin device, meansfor attaching said pressureever to said link and to saidpressure-applying device.

-8. vIn a-lens-grinding machine, the combination with agrindingmember,-of a pressurelever fulcrumed at one end,. means'to oscillate thesaidlever in a plane substantially parallel to the plane of the saidgrinding member, yielding means for applying pressure to said lever ina'direction at right angles to the plane of the oscillation of saidlever, and means for-communicating the motion of {)he pressure-lever tothe said grinding memer.

9. In a lens-grinding machine, the combination with a grinding member,of a pressurelever fulcrumed at one end, means to oscillate saidpressure-lever in a plane substan tially parallel to the lane of thesaid grinding member, means or applying pressure. to said lever in adirection transversely to the plane of the oscillation of the saidlever, and means for communicating the motion of the pressure-lever tothe said grinding member.

10. In a lens-grinding machine, the combination with agr1nding-member,of a pressurelever fulcrumed at one end, means to drawthe said lever in one direction in a plane substantially -parallel tothe plane of the said I (girinding ,member, independent means for rawingthe lever in the opposite dlrection,

' or applying pressure to said lever m a plane transversely to the planeof the osclllation of said pressure-lever, and means for communicatingthe motion of the pressurelever to the said grinding member.

11. In a lens-grinding machine, the combination with a grindingmember,of a pressurelever fulcrumed at one end, means for positivelydrawing the pressure-lever in one direction and in a planesubstantiallyparallel to the plane of said grinding member, independentyielding means for drawing the pressure-lever in the opposite direction,means for applying pressure to said lever in a direction transversely tothe plane of the oscillation of said pressurelever and means forcommunicating the motion of the pressure-lever to the said grindingmember.

12. In a lens-grinding machine, the combination with a grindingmember,of a pressure lever fulcrumed at one end and provided at theother With a hook, a link engaging said hook, means to oscillate saidlink, means also connected to said hook for a plying a pressure to saidhook transversely to the plane of the oscillation of saidpressure-lever.

13. In a lens-grinding machine, the combination with the grindingmembers, of a driving-shaft, a supplemental shaft geared to salddriving-shaft, a ressure-lever, means connected to the supp ementalshaft and to said lever for drawing the lever in one direction, indeendent means for drawing the pressure ever in the opposite direction,

means for applying pressure to the said lever in a direction transverseto the plane of the oscillation of said pressure-lever, and meansintermediate of the ends of the lever for communicating the motion ofthe lever to one of the grinding members.

14. In a lens-grinding machine, the combination with the grindingmembers, of a driving-shaft, a lever provided at one end with theuniversal joint, a supplemental shaft geared to said driving-shaft,means connected to the supplemental shaft and to the free end of saidpressure-lever to oscillate said lever in one direction, yieldin meansalso connected to the free end of t c said pressure-lever to oscillatesaid lever in an opposite direction, a second yielding means tending tomove the said free end in a direction transverse to the plane of theoscillation of the lever, and means for communicating a resulting motionof said pressure-lever to one of the grinding members.

In wltness whereof I have hereunto set my hand this 30th day of January,A. D. 1906.

ANTON WAGNER.

Witnesses:

J. HENDERSON, HARRY COBB KENNEDY.

